Method and mold for making concrete blocks



AfB. FCANS METHOD AND MOLD FOR MAKING CONCRETEBLOQKS Jan'.` 15, 1924. 1,481,087

Filed May 16., 1923 'n l: l

I//lllIl/lllllIllf/llll/ J4 BY I u ATTORNEYJ` Patented Jan. 15, 1924.

U l 'l' E T TES ANDREW B. roANs, or nnw'xonx, N. Y.

METHOD AND MOLD FORk MAKING CONCRETEBLOCKS.

application inea May 1s, 1923. serial No. 639,258.-

the bottom. The brackets are fixed to the To all who/ml it may concern.'

Be it known that I, ANDREW B. FoANs, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful Improvements in Methods and Molds for Making Concrete Blocks, of which the following is a specification.

This invention relates to a mold and method of making concrete building blocks of the kind in which two spaced sections of the block are connected together by tie rods.

An object of the invention is to provide i the block with a continuous air space dividing the sections, and tie rods securely anchored in the concrete so as to firmly hold the spaced sections together.

Another object of the invention is to provide means arranged in the box to slidingly coact with the tie rods so that the block can readily be removed after the concrete sets.

Another object of the invention is to provide a simple and ellicient method of moldi ing the blocks without the employment of a core member made to form the air space between the parallel sections of concrete.

Another object of the invention is to provide a method of molding the two block sections' in which one section is formed, then reversed, and the projecting tie rods inserted into the concrete of a second mold.

The invention resides more particularly in the novel combinations hereinafter described and claimed, reference being made to the accompanying drawing in which Fig. 1 represents a vertical longitudinal section of a mold embodying this invention.

lFig. 2 is a vertical transverse section taken along the line 2-2 of the same.

Fig. 3 is a plan view of the same.

Fig. 4 is a perspective view of a tie rod.

Fig. 5 is a vertical longitudinal section showing the method of making the second section.

Fig. 6 is a vertical transverse section taken along the line 6-6 of Fig. 5.

Fig. 7 is a vertical longitudinal section showing the method of forming a corner block.

Fig. 8 is a perspective view of a block.

In the drawing the numeral 10 designates a mold or box having an open top and pro-- vided with pairs of brackets 11 extending inwardly from the sides of the box above side and each has a bifurcated or slotted end 12 to support a tie rod 14 projecting upwardly. The tie rod is substantially U shaped and the two Shanksv are turned inwardly at their lower ends to slidingly or removably coact with the slots of a pair of the brackets, as indicated in Fig. 3. There are two of the tie rods shown, but it will be understood that any number could be used depending on the size of the block. A removable side 18 attached to the box by hooks 19 or otherwise, permits the withdrawal of the block sectionafter the concrete sets.

The method of forming the block. of concrete shown in Fig. 8 includes a trough like box made in any shape to conform to the contour of the concrete block. The tie rods are positioned in the slots `12 and the cement is poured into the box thereby embeddingl the lower portions of the tie rods in the block, while the upper part projects upward; the section can then be removed from the mold by sliding it out.

The second section is then molded in a box 15 which is filled with concrete and the rst section is turned upside down. The `air space between the sections is gauged by blocks of wood 17 arranged on top of the box 15 before the projecting ends of the tie vrods are inserted into the concrete.` After the cement sets-in the box 15 the section can be lifted or the transverse en s of the rods securely emvbedded in the block.

The method'o forming the corner block shown in Fig. 7 consists in providing a box 2O with an upwardly projecting extension 21 to form the angle to the lower block. An upper box 16 having slots 22 in the bottom is arranged over the lower'box. The slots can be covered with paper or other material to prevent leakage of concrete. Both boxes can be provided with removable sides to permit removal of the sections after they set. The slots in thebox permit the tie rods to move outwith the block section. The slots in the box 16 extend transversely to the edge adjacent to the removable side so that when it is desirable to remove the box from theconorete block all that is necessary is to detach a side, such as 18, in Fig. 3 and slide the box from the block. After the side and block 17 are reulled out of the box with l moved the box can be pushed downward to loosen it from the concrete block and the slots then permit the box to be slid from under the concrete block. The slots glide by the portions of the rods exposed between t-he two concrete blocks.

I claim:

l. Arnold for making concrete blocks comprising a box having an open top, biturcated brackets secured in the box, and tie rods arranged to inovably coact with the brackets projecting upwardly from the box.

2. A mold for making concrete blocks coniprising a box having an open top, biturcated brackets secured in the'sides of the box, tie rods arranged to slidingly coact with the brackets projecting upwardly from the box, and a removableside board to open the box so as to slide the block from the box.

8. A mold for making' concrete blocks comprising a lower box having an open top, bifurcated brackets secured in the lower box, tie rods arranged to slidingly coact .with the 4brackets projecting upwardly from the box,

a box mounted above the lowerbox, and slots located in the upper box made to slidingly engage the projecting tieJrods.

4. A mold for making concrete blocks comprising a lower box having :in open top, with an upwardly projecting extension, bifurcated brackets secured in the lower box, tie rods arranged to slidingiy coact with the brackets projecting upwardly from the box, a box mounted above the lower box, means for gauging the distance of the box abovethe lower box, and slots in the upper box made to slidingly engage the projecting tie rods.

5. The method of making two section concrete blocks having a continuous air space with connecting tie rods, which consists in molding one of the sections with portions of the tie rods embedded and projecting therefrom, reversing the section, and molding thefsecond block to embed portions of the projecting tie rods.

6. The method rof making concrete blocks Aso that their ends project therefrom, pouring concrete into the box, removing the block from the box reversing the block and inserting the projecting portions or' the tie rods into a mass of concrete `formed in a box.

in testimonyl whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ANDREW' B. FOANS. Nitnessesz lvLxRGARE'r ALTVA'IER, WILLIAM MILLER. 

